1

Leucine, Leu, L
2

Proline, Pro, P
3

Alanine, Ala, A
4

Valine, Val, V
5

Methionine, Met, M
6

Isoleucine, Ile, I
7

Tryptophan, Try, W
8

Phenylalanine, Phe, F
9

Glycine, Gly, G
10

Serine, Ser, S
11

Asparagine, Asn, N
12

Cystine, Cys, C
13

Glutamine, Glu, Q
14

Threonine, Thr, T
15

Tyrosine, Tyr, Y
16

Aspartic acid, Asp, D
17

Glutamic acid, Glu, E
18

Lysine, Lys, K
19

Arginine, Arg, R
20

HIstidine, His, H
21
Aspartic Acid pka (B-carboxyl)=
3.9 (-) charge at pH 7
22
Glutamic acid pka (y-carboxyl)=
4.1 (-) charge at pH 7
23
Histidine pka (imidazole)=
6.0 no charge at pH 7
24
Cysteine pka(sulfhydryl)=
8.4 no charge at pH 7
25
Tyrosine pka ( phenolic OH )
10.5 no charge at pH7
26
Lysine pka (E-amino)=
10.5 (+) charge at pH 7
27
Arginine pka (guanidino group )=
12.5 (+) charge at pH 7